Prismatic faces of KDP crystal, kinetic and mechanism of growth from solutions

Alexandru, H.V.; Antohe, S.

doi:10.1016/s0022-0248(03)01429-5

Cited by 46 publications

(38 citation statements)

References 24 publications

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“…This is close to 9.46×10 -6 m/s, 0.17 and 0.41(σ>0.06), reported by H.V. Alexandru, et al [27]. The dependence of face growth rate is described with a two-dimensional nucleation model, although a dislocation growth model may be in better accordance with the practical growth especially at low supersaturation while 2D nucleation only appears at high supersaturation.…”

Section: Discussionsupporting

confidence: 88%

“…The dependence of face growth rate on supersaturation is similar to the dependence of step velocity on supersaturation [27]. As to our experiment in the presence of polyphosphates, σ c can be easily determined, while the abrupt increase at σ* can be seen obscurely from the curve of R(σ) in figure 4, the two sides of which is a parabolic dependence and a linear dependence.…”

Section: Discussionsupporting

confidence: 79%

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In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

Liu¹,

Fang

Wang

et al. 2008

Cryst. Res. Technol.

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The face growth rate and critical supersaturation of {100} face were in situ measured using the laserpolarization-interference technique in the presence of potassium pyrophosphate, trimetric sodium phosphate and sodium hexametaphosphate impurities. The polyphosphate impurities inhibit the growth rate of prismatic faces. The face growth rate as a function of supersaturation at different impurity concentrations, as well as critical supersaturation as a function of impurity concentrations, was found in good agreement with a twodimensional nucleation model in the pure system and Kubota and Mullin's model in the presence of impurities. The average distance L between active sites available for impurity adsorption as well as the edge free energy was calculated.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionsupporting

confidence: 79%

In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

Liu¹,

Fang

Wang

et al. 2008

Cryst. Res. Technol.

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“…By fitting R-σ equation, we derived the kinetic coefficient β 1 and the edge free energy ratio γ/kT, which are also shown in table 2. The γ/kT results (0.37-0.61) are close to the kinetic data influence of Fe 3+ (0.26-0.37) [9], P 2 O 7 4-(0.32-0.46) and P 3 O 10 5-(0.29-0.34) [4], which were estimated from the same model. The increase of γ/kT demands the growth units more energy to accomplish locating at the right position, which maybe the reason why the growth of (100) face was inhibited.…”

Section: -supporting

confidence: 74%

Influence of SiO₃^2‐ impurity on growth habit of potassium dihydrogen phosphate crystal

Ding

Wang³

et al. 2010

Cryst. Res. Technol.

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By altering the concentration of silicate (SiO 3 2-) impurity in the solution, a series of potassium dihydrogen phosphate (KDP) crystals was obtained by the conventional temperature cooling and the rapid growth methods, respectively. It was observed that the presence of SiO 3 2-made KDP crystals tapering in conventional cooling method, while more SiO 3 2-induced inclusions at prismatic sectors in the rapid growth method. Laser-polarization-interference results showed that SiO 3 2-extended the dead zone and reduced the growth rate of (100) face of KDP crystals. The negative influence of SiO 3 2-on the growth was considered absolutely similar to the effect of cations. It was also suggested that the stability of solution doped with SiO 3 2-was improved without seed crystals, while it was destructed with seed crystals. The inhibition mechanism was analyzed in terms of SiO 3 2-absorption on (100) face.

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“…It is well known that the presence of a small amount of impurities can considerably influence the growth habit, optical properties and dielectric properties of KDP crystals [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis, Raman spectroscopy and complex impedance analysis of Cu2+-doped KDP

Ettoumi

Gao

Toumi

et al. 2013

Ionics

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Raman spectroscopy and differential thermal analysis (DTA) and thermogravimetric analysis have been carried out on Cu-doped KH 2 PO 4 (Cu-KDP). X-ray diffraction powder data reveal that the structure of the KDP crystal does not change with the additive Cu 2+ ion. DTA analysis and Raman study of Cu-KDP as a function of temperature reveal that this compound undergoes two phase transitions at about Ttr =453 and 473 K. The electrical conductivity measurements on polycrystalline pellet of Cu-KDP (5) are performed from room temperature (RT) up to 495 K. Only one phase transition is observed at 470 K. The activation energy in the migration is 0.42 eV in the temperature range from RT to 470 K. For temperature above 470 K, the activation energy of the superprotonic phase is 1.87 eV.

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Prismatic faces of KDP crystal, kinetic and mechanism of growth from solutions

Cited by 46 publications

References 24 publications

In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

Influence of SiO₃^2‐ impurity on growth habit of potassium dihydrogen phosphate crystal

Thermal analysis, Raman spectroscopy and complex impedance analysis of Cu2+-doped KDP

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Prismatic faces of KDP crystal, kinetic and mechanism of growth from solutions

Cited by 46 publications

References 24 publications

In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

Influence of SiO32‐ impurity on growth habit of potassium dihydrogen phosphate crystal

Thermal analysis, Raman spectroscopy and complex impedance analysis of Cu2+-doped KDP

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Influence of SiO₃^2‐ impurity on growth habit of potassium dihydrogen phosphate crystal